Delta-sigma ( ) analog-to-digital converters (ADC’s) rely on oversampling to achieve high-resolution. By applying multibit quantization to overcom stability limitations, a circuit topology with greatly reduced oversampling requirements is developed. A 14-bit 500-kHz ADC is described that uses an oversampling ratio of only 16. A fourth-order embedded modulator, four-bit quantizer, and self-calib...

We employ techniques developed and used in the design of parallel sorting algorithms to propose a new framework for sequential sorting. This framework is then used to design new deterministic and randomized sorting methods whose asymptotic worst-case running time can match the existing lower bound for sorting, yet their practical performance, as witnessed by an experimental study, surpasses exi...

Sigma-delta modulation, where a single-bit quantiser is embedded within a negative feedback loop (Fig. 1), is now a commonly-used technique for implementing high-resolution analogue-to-digital and digital-toanalogue converters (DACs), principally because of a favourable insensitivity to component tolerancing [1]. Single-bit quantisation generates relatively high levels of quantisation noise, he...

It is known that in the selected mapping (SLM) scheme for orthogonal frequency division multiplexing (OFDM), correlation (CORR) metric outperforms the peak-to-average power ratio (PAPR) metric in terms of bit error rate (BER) performance. It is also well known that four times oversampling is used for estimating the PAPR performance of continuous OFDM signal. In this paper, the oversampling effe...

In this work, the problem of anomaly detection in imbalanced datasets, framed context network intrusion is studied. A novel solution that takes both data-level and algorithm-level approaches into account to cope with class-imbalance proposed. This integrates auto-learning ability Reinforcement Learning oversampling a Conditional Generative Adversarial Network (CGAN). To further investigate pote...

A 0.8V second order ∆Σ modulator is designed in 0.18μm bulk CMOS technology. Dynamic threshold MOSFET (DTMOS) technique is used to enhance the performance of the circuit building blocks at very low supply voltage. Schematic and post layout simulation results are provided. In case of the amplifier with the embedded CMFB, the measurement results are presented. The modulator can achieve a SNR of a...

The concept of biorthogonal partners has been introduced recently by the authors. The work presented in this paper is an extension of some of these results to the case where the upsampling and downsampling ratios are not integers but rational numbers. Hence the name fractional biorthogonal partners. The conditions for the existence of stable and of FIR fractional biorthogonal partners are deriv...